Effects of Replacing Different Partial Alfalfa Hay with Ramie Silage on Performance, Milk Composition and Serum Parameters of Dairy Cows

WU Duanqin, WEI Zhongshan, GAO Shuai, LI Zhicai, ZENG Guozhang, HOU Zhenping, WANG Yanzhou, DAI Qiuzhong

doi:10.3969/j.issn.1006-267x.2017.05.024

2017 , Vol. 29 >Issue 5: 1645 - 1651

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.05.024

Molecular Nutrition

Effects of Replacing Different Partial Alfalfa Hay with Ramie Silage on Performance, Milk Composition and Serum Parameters of Dairy Cows

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1. Institute of Bast Fiber Crops, Chinese Academy of Agricultrial Sciences, Changsha 410205, China;
2. Hunan Institute of Animal Science and Veterinary Medicine, Changsha 410131, China;
3. Hunan Deren Animal Husbandry Co., Ltd., Changsha 410131, China

Received date: 2016-11-01

Online published: 2017-05-13

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Abstract

This experiment was conducted to study the effects of replacing alfalfa hay with ramie silage in diet on performance, milk composition and serum parameters of dairy cows. Twenty-four healthy Holstein cows with similar body weight, parity and milk yield were randomly divided into four groups with 6 cows per group. Different proportions [0 (control group), 33% (trial group 1), 67% (trial group 2) and 100% (trial group 3)] of alfalfa hay in diet were replaced with equivalent ramie silage. The pretrial lasted for 14 d, and the trial lasted for 60 d. The results showed as follows: 1) the contents of crude protein, ether extract, crude fiber and crude ash were higher in ramie silage than alfalfa hay. 2) Dry matter intake, milk yield and milk composition contents were not significantly affected by replacing of alfalfa hay with ramie silage (P>0.05). 3) Serum total protein, albumin, glucose, triglyceride and glutathione peroxidase contents, and aspartate aminotransferase and alanine transarninase activities were not significantly affected by replacing of alfalfa hay with ramie silage (P>0.05). 4) Serum urinary nitrogen content of trial group 3 was significantly higher than that of trial groups 1 and 2 (P<0.05), but no significant difference with control group was found (P>0.05). 5) Serum total cholesterol content of control group and trial group 1 was significantly higher than that of trial group 2 (P<0.05), and there was no significant difference between trial groups 2 and 3 (P>0.05). 6) With the increase of ramie silage proportion, serum total antioxidant capacity and superoxide dismutase content were increased, and trial group 3 was significantly higher than control group (P<0.05). Therefore, alfalfa hay can be replaced with silage ramie in diary diet without effects on performance, milk composition and serum parameters, and the optimum proportion was 33% to 67% under this experimental conditions.

Key words： ramie silage; Holstein cow; performance; milk composition; serum biochemical parameter; serum antioxidant parameter

Cite this article

WU Duanqin, WEI Zhongshan, GAO Shuai, LI Zhicai, ZENG Guozhang, HOU Zhenping, WANG Yanzhou, DAI Qiuzhong . Effects of Replacing Different Partial Alfalfa Hay with Ramie Silage on Performance, Milk Composition and Serum Parameters of Dairy Cows[J]. Chinese Journal of Animal Nutrition, 2017 , 29(5) : 1645 -1651 . DOI: 10.3969/j.issn.1006-267x.2017.05.024

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